Factor Completely $m ^ { 2 } + 28 m + 196$

Multiple Choice

Factor completely. Check by multiplying the factors. $m ^ { 2 } + 28 m + 196$

A) $( m + 1 ) ( m + 196 )$
B) $( m + 14 ) ( m + 14 )$
C) $( m - 1 ) ( m - 196 )$
D) $( m - 14 ) ( m + 14 )$
E) $( m - 14 ) ( m - 14 )$